We’re seeking a Software Engineer with hands-on experience in secure, modular systems to support development of a Distributed Data Framework (DDF) catalogue and integrate features from the Codice Alliance framework. This sub family is responsible for performing the software engineering function, including the design, development, testing, troubleshooting, and debugging of software programs for enhancements and new software-intensive systems and products. Applies appropriate principles, standards, processes, procedures and tools throughout the software development life cycle. Duties include software requirements analysis, analysis of hardware compatibility, development of software products and tools used for design, development and maintenance of infrastructure, and platforms. • IMPACT: Works to achieve day-to-day objectives with moderate impact on the area/ project team. Works independently on larger, moderately complex projects/assignments. May assist other technical staff with tasks and assignments. • COMPLEXITY: Addresses somewhat complex technical issues/problems using internal best practice and through collaboration with colleagues. Develops solutions to technical problems that require depth of technical knowledge, but are typically limited in complexity. • COMMUNICATION: Communicates with colleagues across multiple areas (project managers, other technical resources, etc.). Explains technical solutions, practices and procedures to others within the organization. Will also communicate with the customer, capturing requirements & demonstrating progress. • LEADERSHIP & TALENT MANAGEMENT: KNOWLEDGE: Requires working knowledge of and ability to apply standards, principles, theories, concepts, and techniques of technical domain. • TYPICAL EDUCATION & EXPERIENCE: Typically requires BS degree and 2 – 4 years of prior relevant experience or Masters with less than 2 years of prior relevant experience. Your Role and Responsibilities. What Youll Do: • Develop and maintain a DDF-based catalogue system • Upgrade an existing DDF cataloguing system to latest versions, preserving and enhancing custom built features • Integrate and extend Codice Alliance tools with the existing catalogue • Build secure and modular services for ingesting, indexing, and querying geospatial and imagery data • Work with OSGi, Apache Karaf, and other modular Java platforms • Ensure compliance with data security, access control, and audit requirements • Create Design and Build documentation derived from customer requirements. Required Experience: • Strong Java development experience, especially in modular or distributed systems • Familiarity with OSGi, Apache Karaf, and the DDF architecture • Experience with REST APIs, secure data handling, and geospatial data formats • Experience with build tools (Maven), version control (Git), and CI/CD pipelines • Experience with geospatial standards (OGC, GeoJSON, WKT, etc.) • Knowledge of Elasticsearch, Solr, or other search indexing tools • Familiarity with classified or sensitive data environments • Understanding of mission systems in defence and intelligence, particularly with ISR. • Experience of independently understanding and writing source code. Are you ready to make an impact? Begin your journey of a flourishing and meaningful career, share your CV with us today! What we do for you: At Leidos we are PASSIONATE about customer success, UNITED as a team and INSPIRED to make a difference. We offer meaningful and engaging careers, a collaborative culture, and support for your career goals, all while nurturing a healthy work-life balance. We provide an employment package that attracts, develops and retains only the best in talent. Our reward scheme includes: • Contributory Pension Scheme • Private Medical Insurance • 33 days Annual Leave (including public and privilege holidays) • Access to Flexible benefits (including life assurance, health schemes, gym memberships, annual buy and sell holidays and a cycle to work scheme) • Access to Flexi-time benefits